git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
index 1ad324e23696f66451a9ffc05d77f459bf106e83..6ddf04d2161e5fd959c2fd69a7331520e8075d98 100755 (executable)
--- a/GIT-VERSION-GEN
+++ b/GIT-VERSION-GEN
@@ -16,7 +16,8 @@ elif test -d .git &&
        case "$VN" in
        *$LF*) (exit 1) ;;
        v[0-9]*)
-               git diff-index --quiet HEAD || VN="$VN-dirty" ;;
+               test -z "$(git diff-index --name-only HEAD)" ||
+               VN="$VN-dirty" ;;
        esac
 then
        VN=$(echo "$VN" | sed -e 's/-/./g');